--- title: Customize ICS Files for Attendees description: Easily customize ICS files for Outlook and Apple calendars to include all the details your attendees need. Add key information, links, and more to foster a seamless add-to-calendar experience. --- [Skip to content](https://kb.bigmarker.com/knowledge/customizable-ics-files#main-content) English Show submenu for translations [![Size=36px, Style=On-light, Brand=BigMarker-1](https://kb.bigmarker.com/hs-fs/hubfs/Size=36px%2c%20Style=On-light%2c%20Brand=BigMarker-1.png?width=171&height=36&name=Size=36px%2c%20Style=On-light%2c%20Brand=BigMarker-1.png)](https://www.bigmarker.com/) Open main navigation Close main navigation - English Show submenu for translations Welcome to the BigMarker Knowledge Base! - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://kb.bigmarker.com/knowledge?hsLang=en) 2. [Webinars and Series](https://kb.bigmarker.com/knowledge/webinars-and-series?hsLang=en) 3. [Emails & Invitations](https://kb.bigmarker.com/knowledge/webinars-and-series?hsLang=en#emails-invitations) # Customize ICS Files for Attendees ## Easily customize ICS files for Outlook and Apple calendars to include all the details your attendees need. Add key information, links, and more to foster a seamless add-to-calendar experience. Using the classic admin? [Click here](https://kb.bigmarker.com/knowledge/customizable-ics-files#session_admin) to learn where you can find the ICS file settings. Whenever someone registers for your session, series or event, they'll have an opportunity to add it to their personal calendar. The details of this calandar invite are usually populated by the details, such as the title, description, and start time of your session. Sometimes, these details don't line up with exactly what you want to convey to your audience int heir own calendars. With the ability to customize the ICS file, you can fully customize the text and content of these calendar invites to better align with your content. While this setting primarily focuses on ICS files for Apple and Outlook calendars, changing the title and description from the default will also affect the Google Calendar invite. ### Customizing the ICS file To customize the ICS file, go into the **Emails** page and click on the **Customize ICS** button. This will open up the same settings as described above. ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Feb-04-2026-05-32-39-2319-PM.png?width=600&height=218&name=image-png-Feb-04-2026-05-32-39-2319-PM.png) Clicking on this opens a side-sheet of all the settings available to create or upload an ICS file ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Jun-01-2026-05-12-52-6305-PM.png?width=450&height=390&name=image-png-Jun-01-2026-05-12-52-6305-PM.png) You can decide to use an ICS file created on BigMarker for this, or upload a new one from your computer. When updating the invite on the platform, you'll have the ability to update the title and description, the start time and duration, the notification settings, and more. ### ICS File Settings After you configure the date and time for your calendar invite you have a few **Settings** that you can configure. An important setting is whether you want to **Auto-add** the invite to your registrants calendars. When this setting is off, recipients need to add the event to their calendar manually. They'll need to interact with or download the ICS file they receive in order for it to appear in their calendar. When this setting is on, the calendar event is automatically added to the recipient's calendar when they receive the email. They will still accept or decline the calendar invite once it is there. ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Nov-05-2026-04-31-26-4582-PM.png?width=450&height=378&name=image-png-Nov-05-2026-04-31-26-4582-PM.png) When this setting is enabled, some email clients may automatically delete the original email after a registrant accepts, declines, or deletes the auto-added calendar invite. This could remove the registration confirmation email from their inbox. To help prevent this, enable **Auto-add with a separate calendar invite**. This sends the calendar invite in its own email, separate from the registration confirmation email. ### Replacing calendar invites With the ICS file editor, you have another option to replace an existing calendar invite. If users registered for one event and got a calendar invite, you can make it so a separate event's calendar invite would replace the first. Let's say you have one session that users register for, but you have to cancel and reschedule. Users already saved the original event to their calendar, and you want the new time you schedule to replace those existing calendar invites. This setting allows you to do just that. In the ICS editor, look for the setting **Replace Calendar Event**. Enable this and you will see a dropdown menu. In this menu you'll be able to search through all of the content on you channel. You can only choose one webinar or series from here. The webinar chosen determines which calendar invite will be replaced by the one being edited. ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Jun-01-2026-05-16-47-3841-PM.png?width=450&height=218&name=image-png-Jun-01-2026-05-16-47-3841-PM.png) ### ICS Files for series schedules When hosting a [series](https://kb.bigmarker.com/knowledge/summits-or-series?hsLang=en), you may want your ICS file to include a separate calendar event for each session rather than a single event for the entire series. This helps registrants keep track of their schedule, especially for itinerary series where they choose which sessions to attend. ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Oct-30-2026-02-25-03-1031-PM.png?width=600&height=201&name=image-png-Oct-30-2026-02-25-03-1031-PM.png) You can customize the series ICS file to match each registrant’s session schedule. To do this, edit the registration confirmation email, open its ICS file settings, and enable **Make each session its own calendar event.** ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Oct-30-2026-02-24-38-3695-PM.png?width=450&height=304&name=image-png-Oct-30-2026-02-24-38-3695-PM.png) When this setting is enabled, the ICS file attached to the registration confirmation email is personalized for each registrant and includes only the dates and times of the sessions they’ve registered for within the series. ### ICS Files in the classic admin In your [webinar dashboard](https://kb.bigmarker.com/knowledge/the-manage-webinar-dashboard?hsLang=en), go to the **Emails & Invitations** page at the top of the screen and fine **ICS File** in the left-hand navigation menu. ![](https://kb.bigmarker.com/hs-fs/hubfs/Screen%20Shot%202024-12-03%20at%201-31-34%20PM-png.png?width=600&height=284&name=Screen%20Shot%202024-12-03%20at%201-31-34%20PM-png.png) - [Getting Started](https://kb.bigmarker.com/knowledge/getting-started?hsLang=en#main-content) - 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